Test & Measurement


Clip-on temperature sensor

15 April 2009 Test & Measurement

Spectrum Sensors and Controls has introduced a series of clip-on temperature sensor assemblies designed to provide a low-cost option for applications where ease of installation and excellent thermal tracking are important. The sensor assembly is thermally tied to the pipe via a specially designed copper clip, ensuring good thermal contact with the copper tube. The sensor element has accuracy of ±0,2°C from 0°C to 70°C and reacts quickly to changes in tube temperature because the sensor housing is held closely to the tube.

The temperature sensor consists of an epoxy coated NTC thermistor featuring a unique internal construction that provides moisture resistance by sealing the sensing element from the outside environment. Standard resistance values range from 2252 to 10 k. Internal thermistor constructions are available for applications not requiring moisture resistance, as are RTDs and silicon PTC sensor elements.

The sturdy, all-metal construction and design of the clip allows the housing to be installed onto a straight section of copper tubing with outer diameter from 9,5 mm to 16 mm and to remain snug even after being removed and installed numerous times. For maximum accuracy, a thermally insulating material can be wrapped over the sensor assembly, which is especially effective when there is a large temperature gradient between the tube and the outside air temperature.



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